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Discount Generic Viagra

Symptoms include a headache, dizziness, or fainting when standing. Always buy your ED medications from a reputable supplier as there are a lot of counterfeit products on the market. It works within 30 to 60 minutes, but may be taken up to four hours before sexual activity. Sildenafil blocks the action of an enzyme known as cGMP-specific phosphodiesterase type-5 (PDE-5). Taking Viagra could help prevent the problem and avoid an injury with lifelong consequences, he says. Combining the treatments has a cumulative effect — penile injection therapy makes your erections hard, and adding Viagra makes them harder and even more long-lasting. It is eliminated predominantly by hepatic metabolism and is converted to an active metabolite with properties similar to the parent, sildenafil. Both sil...